networkd: rework headers to avoid circular includes

Header files were organized in a way where the includer would add various
typedefs used by the includee before including it, resulting in a tangled
web of dependencies between files.

Replace this with the following logic:

          networkd.h
         /          \
networkd-link.h      \
networkd-ipv4ll.h--\__\
networkd-fdb.h         \
networkd-network.h    netword-netdev-*.h
networkd-route.h           \
                      networkd-netdev.h

If a pointer to a structure defined in a different header file is needed,
use a typedef line instead of including the whole header.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/network/networkd-address.h b/src/network/networkd-address.h
index 338f6eb9a2..3b5285abf0 100644
--- a/src/network/networkd-address.h
+++ b/src/network/networkd-address.h
@@ -28,10 +28,12 @@ typedef struct Address Address;
 
 #include "networkd-link.h"
 #include "networkd-network.h"
-#include "networkd.h"
 
 #define CACHE_INFO_INFINITY_LIFE_TIME 0xFFFFFFFFU
 
+typedef struct Network Network;
+typedef struct Link Link;
+
 struct Address {
         Network *network;
         unsigned section;